Paul E. McKenney bc293d62b2 rcu: Make RCU lockdep check the lockdep_recursion variable ... The lockdep facility temporarily disables lockdep checking by incrementing the current->lockdep_recursion variable. Such disabling happens in NMIs and in other situations where lockdep might expect to recurse on itself. This patch therefore checks current->lockdep_recursion, disabling RCU lockdep splats when this variable is non-zero. In addition, this patch removes the "likely()", as suggested by Lai Jiangshan. Reported-by: Frederic Weisbecker <fweisbec@gmail.com> Reported-by: David Miller <davem@davemloft.net> Tested-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com Cc: eric.dumazet@gmail.com LKML-Reference: <20100415195039.GA22623@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2010-04-19 08:37:19 +02:00
..
gcov	microblaze: Enable GCOV_PROFILE_ALL	2009-09-21 14:29:21 +02:00
irq	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-04-06 13:03:22 -07:00
power	PM / Hibernate: user.c, fix SNAPSHOT_SET_SWAP_AREA handling	2010-04-10 22:28:56 +02:00
time	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
trace	Merge branch 'master' into export-slabh	2010-04-05 11:37:28 +09:00
.gitignore
acct.c	copy_signal() cleanup: kill taskstats_tgid_init() and acct_init_pacct()	2010-03-12 15:52:39 -08:00
async.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
audit.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
audit.h
audit_tree.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
audit_watch.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
auditfilter.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
auditsc.c	audit: preface audit printk with audit	2010-04-05 13:19:45 -07:00
backtracetest.c
bounds.c	kbuild: move bounds.h to include/generated	2009-12-12 13:08:14 +01:00
capability.c	capabilities: Use RCU to protect task lookup in sys_capget	2009-12-10 09:42:48 +11:00
cgroup.c	cgroups: remove duplicate include	2010-03-24 16:31:19 -07:00
cgroup_freezer.c	Merge branch 'master' into export-slabh	2010-04-05 11:37:28 +09:00
compat.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
configs.c
cpu.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
cpuset.c	cpuset: alloc nodemask_t on the heap rather than the stack	2010-03-24 16:31:21 -07:00
cred-internals.h
cred.c	Merge branch 'master' into export-slabh	2010-04-05 11:37:28 +09:00
delayacct.c	headers: taskstats_kern.h trim	2009-09-18 09:48:52 -07:00
dma.c
early_res.c	x86: Do not free zero sized per cpu areas	2010-03-29 18:55:40 +02:00
elfcore.c	elf coredump: add extended numbering support	2010-03-06 11:26:46 -08:00
exec_domain.c
exit.c	mm: avoid null-pointer deref in sync_mm_rss()	2010-04-07 08:38:02 -07:00
extable.c
fork.c	mm: avoid null-pointer deref in sync_mm_rss()	2010-04-07 08:38:02 -07:00
freezer.c
futex.c	futex: Handle futex value corruption gracefully	2010-02-03 15:13:22 +01:00
futex_compat.c	futex: Protect pid lookup in compat code with RCU	2009-12-09 14:22:14 +01:00
groups.c
hrtimer.c	hrtimers: Convert to raw_spinlocks	2009-12-14 23:55:34 +01:00
hung_task.c	softlockup: Fix hung_task_check_count sysctl	2009-11-27 06:21:57 +01:00
hw_breakpoint.c	Merge branch 'perf/core' into perf/urgent	2010-03-04 11:47:52 +01:00
itimer.c	itimers: Fix racy writes to cpu_itimer fields	2009-11-18 16:32:12 +01:00
kallsyms.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks	mutex: Better control mutex adaptive spinning config	2009-12-03 11:50:11 +01:00
Kconfig.preempt
kexec.c	percpu: add __percpu sparse annotations to core kernel subsystems	2010-02-17 11:17:38 +09:00
kfifo.c	kfifo: Don't use integer as NULL pointer	2010-02-16 15:11:08 -08:00
kgdb.c	kgdb: Turn off tracing while in the debugger	2010-04-02 14:58:19 -05:00
kmod.c	kmod: fix resource leak in call_usermodehelper_pipe()	2010-01-11 09:34:04 -08:00
kprobes.c	kprobes: Calculate the index correctly when freeing the out-of-line execution slot	2010-03-11 14:06:16 +01:00
ksysfs.c	Merge branch 'for-next' into for-linus	2010-03-08 16:55:37 +01:00
kthread.c	cpuset: fix the problem that cpuset_mem_spread_node() returns an offline node	2010-03-24 16:31:21 -07:00
latencytop.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
lockdep.c	Merge branch 'slabh' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc	2010-04-05 09:39:11 -07:00
lockdep_internals.h
lockdep_proc.c	seq_file: constify seq_operations	2009-09-23 07:39:29 -07:00
lockdep_states.h
Makefile	elf coredump: replace ELF_CORE_EXTRA_* macros by functions	2010-03-06 11:26:45 -08:00
module.c	Fix up possibly racy module refcounting	2010-04-05 19:50:02 -07:00
mutex-debug.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
mutex-debug.h	locking: Implement new raw_spinlock	2009-12-14 23:55:32 +01:00
mutex.c	mutex: Better control mutex adaptive spinning config	2009-12-03 11:50:11 +01:00
mutex.h
notifier.c	sched: Use lockdep-based checking on rcu_dereference()	2010-02-25 10:34:26 +01:00
ns_cgroup.c	cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time	2009-09-24 07:20:58 -07:00
nsproxy.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
padata.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
panic.c	panic: fix panic_timeout accuracy when running on a hypervisor	2010-03-06 11:26:33 -08:00
params.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-03-12 16:04:50 -08:00
perf_event.c	Merge branch 'master' into export-slabh	2010-04-05 11:37:28 +09:00
pid.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-13 14:43:01 -08:00
pid_namespace.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
pm_qos_params.c	pm_qos: clean up racy global "name" variable	2009-10-14 15:31:10 +02:00
posix-cpu-timers.c	Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-26 15:10:38 -07:00
posix-timers.c	posix-timers.c: Don't export local functions	2010-02-05 14:54:10 +01:00
printk.c	printk: avoid warning when CONFIG_PRINTK is disabled	2010-03-06 11:26:33 -08:00
profile.c	kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file	2009-09-20 20:15:40 +02:00
ptrace.c	ptrace: Fix ptrace_regset() comments and diagnose errors specifically	2010-02-23 13:45:26 -08:00
range.c	x86: Change range end to start+size	2010-02-10 17:47:17 -08:00
rcupdate.c	rcu: Make RCU lockdep check the lockdep_recursion variable	2010-04-19 08:37:19 +02:00
rcutiny.c	rcu: Eliminate unneeded function wrapping	2009-11-22 18:58:16 +01:00
rcutorture.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2010-03-03 07:34:18 -08:00
rcutree.c	rcu: Fix accelerated grace periods for last non-dynticked CPU	2010-02-27 09:53:52 +01:00
rcutree.h	rcu: Increase RCU CPU stall timeouts if PROVE_RCU	2010-03-11 13:38:01 +01:00
rcutree_plugin.h	rcu: Fix holdoff for accelerated GPs for last non-dynticked CPU	2010-02-28 09:17:42 +01:00
rcutree_trace.c	rcu: Stop overflowing signed integers	2010-02-25 10:34:57 +01:00
relay.c	splice: comparing unsigned int < 0	2010-03-06 11:26:32 -08:00
res_counter.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
resource.c	resources: add interfaces that return conflict information	2010-03-23 13:33:50 -07:00
rtmutex-debug.c	sched: Convert pi_lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c	rtmutes: Convert rtmutex.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-04-08 08:37:05 -07:00
sched_clock.c	sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK	2009-12-15 09:04:36 +01:00
sched_cpupri.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
sched_cpupri.h	sched: Convert cpupri lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_debug.c	sched: Fix proc_sched_set_task()	2010-04-02 20:06:40 +02:00
sched_fair.c	sched, rcu: Fix rcu_dereference() for RCU-lockdep	2010-03-01 09:29:58 +01:00
sched_features.h	sched: Discard some old bits	2009-12-09 10:03:07 +01:00
sched_idletask.c	sched: Remove the sched_class load_balance methods	2010-01-21 13:40:09 +01:00
sched_rt.c	Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-13 14:46:18 -08:00
sched_stats.h
seccomp.c
semaphore.c
signal.c	kernel core: use helpers for rlimits	2010-03-06 11:26:33 -08:00
slow-work-debugfs.c	SLOW_WORK: Move slow_work's proc file to debugfs	2009-12-01 08:20:31 -08:00
slow-work.c	slow-work: use get_ref wrapper instead of directly calling get_ref	2010-03-29 09:13:30 -07:00
slow-work.h	SLOW_WORK: CONFIG_SLOW_WORK_PROC should be CONFIG_SLOW_WORK_DEBUG	2010-03-29 09:14:47 -07:00
smp.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
softirq.c	hrtimer, softirq: Fix hrtimer->softirq trampoline	2010-02-03 18:17:40 +01:00
softlockup.c	softlockup: Stop spurious softlockup messages due to overflow	2010-03-21 19:30:13 +01:00
spinlock.c	locking: Cleanup the name space completely	2009-12-14 23:55:33 +01:00
srcu.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
stacktrace.c
stop_machine.c	percpu: add __percpu sparse annotations to core kernel subsystems	2010-02-17 11:17:38 +09:00
sys.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
sys_ni.c	Add generic sys_ipc wrapper	2010-03-12 15:52:32 -08:00
sysctl.c	sysctl extern cleanup: lockdep	2010-03-12 15:53:10 -08:00
sysctl_binary.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
sysctl_check.c	ipv4 05/05: add sysctl to accept packets with local source addresses	2009-12-03 12:14:38 -08:00
taskstats.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
test_kprobes.c
time.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
timeconst.pl
timer.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
tracepoint.c	trivial: fix typo "to to" in multiple files	2009-09-21 15:14:55 +02:00
tsacct.c	mm: clean up mm_counter	2010-03-06 11:26:23 -08:00
uid16.c	headers: utsname.h redux	2009-09-23 18:13:10 -07:00
up.c
user-return-notifier.c	core: Clean up user return notifers use of per_cpu	2009-12-02 10:22:59 +01:00
user.c	sched: Remove USER_SCHED	2010-01-21 13:40:18 +01:00
user_namespace.c
utsname.c
utsname_sysctl.c	sysctl kernel: Remove binary sysctl logic	2009-11-12 02:04:55 -08:00
wait.c
workqueue.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2009-12-10 09:35:44 -08:00